Migrate to flutter2 (duytq94#52)

Migrate to Flutter 2 and using Dart sound null safety
Update version plugins
Update code check
Update some UX (image loading indicator for circle avatar, border wrap loading image indicator...)

Author: duytq94

.flutter-plugins-dependencies

@@ -5,34 +5,33 @@
     <uses-permission android:name="android.permission.VIBRATE" />
 
     <application
-        android:name=".Application"
         android:icon="@mipmap/ic_launcher"
         android:label="flutter_chat_demo">
         <meta-data
             android:name="com.google.firebase.messaging.default_notification_icon"
             android:resource="@mipmap/ic_launcher" />
         <activity
-            android:name="io.flutter.embedding.android.FlutterActivity"
-            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"
+            android:name=".MainActivity"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:windowSoftInputMode="adjustResize">
-            <!-- Specify that the launch screen should continue being displayed -->
-            <!-- until Flutter renders its first frame. -->
-            <meta-data
-                android:name="io.flutter.embedding.android.SplashScreenDrawable"
-                android:resource="@drawable/launch_background" />
-
-            <!-- Theme to apply as soon as Flutter begins rendering frames -->
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                   the Android process has started. This theme is visible to the user
+                   while the Flutter UI initializes. After that, this theme continues
+                   to determine the Window background behind the Flutter UI. -->
             <meta-data
                 android:name="io.flutter.embedding.android.NormalTheme"
-                android:resource="@style/NormalTheme"
-                />
-
+                android:resource="@style/NormalTheme" />
+            <!-- Displays an Android View that continues showing the launch screen
+                 Drawable until Flutter paints its first frame, then this splash
+                 screen fades out. A splash screen is useful to avoid any visual
+                 gap between the end of Android's launch screen and the painting of
+                 Flutter's first frame. -->
             <meta-data
-                android:name="flutterEmbedding"
-                android:value="2" />
+                android:name="io.flutter.embedding.android.SplashScreenDrawable"
+                android:resource="@drawable/launch_background" />
 
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -43,5 +42,10 @@
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </activity>
+        <!-- Don't delete the meta-data below.
+                This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
     </application>
 </manifest>

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,6 @@
+package com.dfa.flutterchatdemo;
+
+import io.flutter.embedding.android.FlutterActivity;
+
+public class MainActivity extends FlutterActivity {
+}

android/app/src/main/java/com/dfa/flutterchatdemo/Application.java

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools"
+    tools:keep="@drawable/*" />

android/app/src/main/java/com/dfa/flutterchatdemo/MainActivity.java

@@ -1,18 +1,18 @@
 #
 # NOTE: This podspec is NOT to be published. It is only used as a local source!
+#       This is a generated file; do not edit or check into version control.
 #
 
 Pod::Spec.new do |s|
   s.name             = 'Flutter'
   s.version          = '1.0.0'
   s.summary          = 'High-performance, high-fidelity mobile apps.'
-  s.description      = <<-DESC
-Flutter provides an easy and productive way to build and deploy high-performance mobile apps for Android and iOS.
-                       DESC
   s.homepage         = 'https://flutter.io'
   s.license          = { :type => 'MIT' }
   s.author           = { 'Flutter Dev Team' => '[email protected]' }
   s.source           = { :git => 'https://github.com/flutter/engine', :tag => s.version.to_s }
   s.ios.deployment_target = '8.0'
-  s.vendored_frameworks = 'Flutter.framework'
+  # Framework linking is handled by Flutter tooling, not CocoaPods.
+  # Add a placeholder to satisfy `s.dependency 'Flutter'` plugin podspecs.
+  s.vendored_frameworks = 'path/to/nothing'
 end

android/app/src/main/res/raw/keep.xml

@@ -2,15 +2,14 @@
 # This is a generated file; do not edit or check into version control.
 export "FLUTTER_ROOT=/Users/lap01434/Documents/Flutter/flutter"
 export "FLUTTER_APPLICATION_PATH=/Users/lap01434/Documents/Flutter/flutter-chat-demo"
+export "COCOAPODS_PARALLEL_CODE_SIGN=true"
 export "FLUTTER_TARGET=/Users/lap01434/Documents/Flutter/flutter-chat-demo/lib/main.dart"
 export "FLUTTER_BUILD_DIR=build"
 export "SYMROOT=${SOURCE_ROOT}/../build/ios"
-export "OTHER_LDFLAGS=$(inherited) -framework Flutter"
-export "FLUTTER_FRAMEWORK_DIR=/Users/lap01434/Documents/Flutter/flutter/bin/cache/artifacts/engine/ios"
 export "FLUTTER_BUILD_NAME=1.0.0"
 export "FLUTTER_BUILD_NUMBER=1"
-export "DART_DEFINES=flutter.inspector.structuredErrors%3Dtrue"
+export "DART_DEFINES=Zmx1dHRlci5pbnNwZWN0b3Iuc3RydWN0dXJlZEVycm9ycz10cnVl,RkxVVFRFUl9XRUJfQVVUT19ERVRFQ1Q9dHJ1ZQ=="
 export "DART_OBFUSCATION=false"
 export "TRACK_WIDGET_CREATION=true"
 export "TREE_SHAKE_ICONS=false"
-export "PACKAGE_CONFIG=.packages"
+export "PACKAGE_CONFIG=/Users/lap01434/Documents/Flutter/flutter-chat-demo/.dart_tool/package_config.json"

ios/Flutter/Flutter.podspec

@@ -1,5 +1,5 @@
 # Uncomment this line to define a global platform for your project
-# platform :ios, '9.0'
+platform :ios, '10.0'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'